1948 The Zoologist — Decembi:!!, 1869. 



magnified 2|- linear. The whole body was divided into folds by 

 numerous wrinkles ; ihe colour ou the dorsum was dark green; the 

 sides and the ventral surface, together with the twelve prolegs and the 

 two anal legs, were grayish green, somewhat yellowish here and there, 

 more especially on the sides of the eleventh and last segments. The 

 head and a triangular mark on the anus were shining black ; the thoracic 

 legs grayish black, annulated with white. These larvaj when feeding 

 usually raised the last five or six segments of the body in the air. 



Some time later, in the month of June, when they were half-grown, 

 their colour was somewhat different. I noted their appearance at 

 that time as follows : — head sordid dark green ; body green, yellow at 

 the sides, with an orange spot on this yellow jjorlion of each segment, 

 except on the last two. The whole body was covered with little oval 

 dark warts. All the legs pale green ; the thoracic legs with black 

 claws. A black spot on the anal valve, and below it, on either side, 

 a pale green spine having a black point. 



Some days later — namely, on the 22nd of June — they had moulted 

 for the last time, and had now the appearance represented in our 

 fig. 4. The following are my notes of it. Head brownish black, the 

 posterior margin and the trophi being paler; the dorsum of the abdo- 

 men deeply wrinkled, dark green, becoming paler towards the apex, 

 where the colour has that peculiar retleclion which is also observed 

 on the skin of the larvae of Notodonta dictajoides. On the sides of 

 the .segments from the first to the eleventh are yellow spots of a some- 

 what triangular form ; see fig. 5, representing the side of the fifth seg- 

 ment. Between and below these yellow spots the colour is pale 

 green ; the ventral surface and all the legs arc likewise of this tint. 

 The thoracic legs are armed with brown claws. The entire body is 

 covered with oval and elliptical shining black spots; of these three 

 are above and three on the before-named yellow spots, one in 

 advance and two behind on each segment, added to which there are 

 two transverse spots above each leg. Above the anus is a^largc ill- 

 defined black spot, and on each side below this a green spine with 

 black tip. 



When full-grown the larva; were 22 nun. long. They were 'very 

 voracious, and moved about very rapidly in the box, in which some 

 (»f them were kept. On the birch tree, however, I observed others 

 almost always quiet and feeding. Tiiey seem to be lovers of freedom 

 who find even a roomy prison too narrow. Wiien one of these larva; 

 was touched by an Aphis the former moved its tail rapidly about ; 



